'03 Mazda B2300 pickup same frame as Ford Ranger. Has only 19,000 miles.
Driven sparely by 92 yr old father to stores, doctor, once/twice from FL to
NC. No rough off road wear. Hitting minor raises in pavement, manhole
covers, RR crossings, etc., triggers quick lateral instability in steering,
almost a shimmy, until weight returns to front end as bounce stabilizes.
Snaps steering wheel feedback to hands a bit on return of weight. Reminds
me of a bad vibration dampener on Volkswagen Beetles. Worrying in
intensity. Very short duration, but feels like rod ends must be taking a
pounding to stabilize. Regular steering seems stable. Alignment and
tracking feel good. Took to Pep Boys for diagnostic, checked tie rods, ball
joints, rack, struts, etc., (hopefully). Reported all tight, no problem
found. Cannot believe this is symptomatic to the small framed Pickup
engineering. What should I test or replace or suspect was missed by Pep
Boys? Is this a known common problem?